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Which conclusion is correct for the equations 9x − 2y = 31 and 27x − 6y = 93?

Answer and explanation

Correct answer: There are infinitely many solutions

The first equation is 9x − 2y = 31. Multiplying it by 3 produces 27x − 6y = 93, exactly the second equation. Therefore, the pair represents two coincident lines, not two intersecting or distinct parallel lines. The coefficient ratios also confirm this: 27/9 = (−6)/(−2) = 93/31 = 3. Every point satisfying the first equation automatically satisfies the second, so infinitely many solutions exist.

Related tags

Linear EquationsCoincident LinesSolvabilityInfinite SolutionsConditions For SolvabilityPair Of Linear Equations In Two VariablesMathematicsClass 10 Mcq

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